Die casting construction.



f sTATES ,PATENT OFFICE.

JOHN LE MA1* AND'MILUS M. HOUSE, or v:NETANArOLIS, INDIANA, ASSIGNOES, BY

lDIRECT AND MESNE ASSreNivrrNTs, To S-ARGENT & COMPANY, or NEW HAVEN,

CONNECTICUT, A CORPQRATION or CONNECTICUT.

nIE CASTING. CONSTRUCTION; v

.Specification of Iletters Patent. Patented' Aug, 10 1915, y

Application fue@ Deeniber 22', 1913. serial No. soaai.

To` all whom it may concern l Be it known that we, JOHN LE MAY and -MILUS M. HOUSE, citizens of the United States, and residents of Indianapolis, county of Marion, and State of Indiana, have in vented a certain new and useful Die Casting Construction; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had tO the accompanying drawings, in which like letters refer to like parts.

The object of this invention is to prevent chilling of the metal before entering the dies and to simplify the sprue or means for supplying metal to the die and facilitates the separation of the die member from the sprue. The first of these objects is attained by providing the die members with a hot pocket in which a large quantity of metal first enters and wherein the heat is retained so that the metal passes therefrom in a molten Condition through the runners to the matrices or die cavities. The other object of the invention is accomplished by connecting the sprue with one of the die members so that it can be readily separated or unscrewed therefrom. l

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:v p

In the drawings, Figure .1 is a central section through the device with the parts in place for die-casting. Fig. 2 is a similar view of the die members and an elevation ofthe sprue separated from the die member after the cavities in the die member have been charged with metal. Fig. 3 vis a section on the line 3-3 of Fig. 2.

There is a s rue 10, an upper die member 11 and lower ie member 12. The invention is not limited to any particularvconstruction of sprue or other means for charging the die, but that herein shown has a conical .opening into which the metal is poured or screwed into connection with the upper die member, as shown in Fig. 1, it is in commu- CGS.

ofa substantially A-shaped cavity 16 in the with a hot pocket or cavity 17 in the lower die member. This hot pocket is also slightly conical, the large end being adjacent the inner surface ofthe lower'die member' and the large end of the gate or cavity 16 in the upper die member. The upper die member is provided with suitable die cavities or matrices'18 which may be formed in any suitable or desired shape and which open at the inner surfaces ofthe upper die member. There may be any number of these die cavities '18 in either upper die member and all of them are in cmmunication with the Iupper die member, which cavity registers inner hot pocket by runners or narrow pasl sageways 19.

The die members are clamped together by otherwise first into the gate 16 and the hot pocket 17 and'therefrom it passes through the runners 19 to the matrices 18. The pocket 17 and end gate 16 together in a sense constitute the hot pocket and since the quantity of hot metal in it is relatively considerable, the metal therein does not become suddenly chilled and supplies hot metal to the runners 19 and the matrices 18. The object of this invention is to bring the hot pocket for the metal close to the matrices so as to prevent the metal from chilling on its passage into the die cavities or matri- Great difficulty has heretofore been eX- perienced on account of 'the chilling of the metal before it reaches the die cavities because of the small capacity of the runners. By enlarging the end gate and forming a hot pocket so that a large quantityof metal will be irst deposited therein before it enters the matrices, this difficulty is avoided.

lVhen the metal is cooled, the sprue 10 is unscrewed from the upper die member. The connection of the metal in the sprue with that in the end gate 16 is so small that it breaks when one undertakes to unscrew 16 is thrown back into the melting pot," it is immaterial how irregular the brealr between the metal in the end gate and the metal in the sprue may be. The die mem-- bers are then separated and the castings lthe sprue. VSince the metal in the end gate l sawed away from the metal which accumulated 1n the runners and the metal trom the hot pocket and runners thrown back into the meltingir pot.

By hot pocket herein is meant a chamber with a runner or passage lead-ingfroml the upper part thereof in such position that it will never be obstructed by the accumula tion of chilled material in the lower part which at the beginning of each process accumulates in the lower part of the hot pocket.

The invention is:

1. In a die casting construction, diem'embers with matrices therein, a hot pocket, and runners extending from the upper portion of' the hot pocket to the matrices, substantially as and for the purpose set forth.

2. ln a die casting construction, a pair of die members, one of them having an end gate and a plurality of matrices, the 'other die member ha ving a hot pocket registering with the end Ltrate. and runners from the upper portion of said hot pocket to the matrices, substantially as set forth.

Ina die casting construction, a die member with ay tapering' end `grate, and a sprue, removably secu-red to said die inember and in emnmuncation with the smaller end o1 the end gate.

4. ln a die casting construction, a die member with an internally threaded hole'in the, outer side thereof and with an end gate with a relatively small end comnumicating with said hole, a sprue with an externally threaded end for screwing into the hole in the die member, a plurality7 of matrices, the other die member havingy a hot pocket registering with the eml gate. and. runners from the upper portion of said hot pocket to the nlatriees. substantiall)y as set forth.

In witness whereof, we have 'hereunto affixed our signatures in presence ol the witnesses herein named.

JOHN LE MAY. MILUS M. HOUSE.

witnesses 1 J. H. Trims O. M. l\I('J-l..\Ueui.iN. 

